F - Mech Eng,Light,Heat,Weapons – 23 – K
Patent
F - Mech Eng,Light,Heat,Weapons
23
K
110/18
F23K 3/00 (2006.01) H01H 37/76 (2006.01)
Patent
CA 1139617
Docket No. 1939-WF ABSTRACT OF THE DISCLOSURE A pressurized, fluidized bed combustor including a housing having a combustor chamber therein with a distributor plate closing the lower portion of the housing and arranged above a fluidizer windbox, which, in turn, is arranged above a heat exchanger inlet plenum which is mounted above a bottom of the combustor. Space above the distributor plate defines a fluidized bed into which a plurality of heat exchanger tubes are disposed. The cooling fluid is arranged to flow into the heat exchanger inlet plenum and pass into the heat exchanger tubes. The cooling fluid is passed through vertically elongated tubes which extend upwardly through the distributor plate and into the bed and is circulated first upwardly in an outside space between the tubes and then downwardly through a passage defined in the interior tube for discharge from the bottom of the reactor. The fluidized air is directed upwardly through tuyeres and dis- charges into the bed. A coal gun is provided for discharging coal into the fluidized bed, and it comprises an outer guide tube which extends from a spaced location above the distributor plate downwardly through the bottom of the combustor chamber and it includes a portion which extends exteriorly of the combustor chamber. This exterior portion carries a ball valve which has a passage therethrough which makes it possible to insert a coal supply pipe upwardly in the interior of the outer guide pipe and through the passage of the ball valve up to substantially the top of the outer pipe at a location above the distributor plate within the reaction bed. For withdrawing the coal supply pipe, it is possible to remove the pipe downwardly through the ball valve until the top end thereof is located directly below the ball valve but still within the outer diameter pipe and located within a stuffing box thereof. At such location, then the ball valve is closed and the ball supply pipe may be withdrawn all the way without reducing the pressure in the reactor.
356728
Curtiss-Wright Corporation
Gowling Lafleur Henderson Llp
LandOfFree
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